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Oct. 9, 1928. 1,687,040 w. D. scHRoPE IGNITION DEVICE Filed Aug. 2, 1526Patented Oct. 9, 1928.

UNITED STATES PATENT OFFICE.

WIILIAM n'. sc'iIRorE, or ANDERSON, INDIANA, AssIGNoR, Er MEsNEASSIGNMENTS, To DELco-REMY coEPonATIoN, E DAYTON, oHIo, A conroEATIoN orDELAWARE.

This invention relates-to ignition timers for internal-combustionengines.'

It is among the objects of thepresvent invention to simplify-theconstruction of 1g,

5 nition timing devices for engines so that the various adjustments'necessaryin-adevice may be made precisely an'd -Wit-hfsimple tools andminimum laborlj Y Further objects 'andl advantages of the presentinvention will be apparent -rom' the following description,- referencebeing'had to the accompanyingV drawings, wherem a preferred fc'i'rxri ofexiibddinent of l 'the present Y intenti@'isciearlyfshwa if.'ntheidiawingsf la i* 'v 5f'- "Fig". lis Ea 'fplan viervvfof' 'theignition timer having lthe' 'distributor -head "removed therefrom.,"'lf'if': 'H'kuu l Y. -'Fig' 21 'is a` fragmentary setionalviewtakenaln'g'the'lin2il2ofEige'1.` :Fi '3"isffa': d :tail `laiiE-vfiiw"foi`4 he' aperture"V mounting -p'latefwith the bridging con#ductormouilted ,thrm -Qther' parts' carsoiFigi'fis'a.detailedfsectintaken'falong the lines Hbf-:Fig3 -7`.:'55;..:..; amar.:- 'adiag'ainnatic viewishowing theelectical"conxiections of the fi'gitionf timer when included in anicgnitipn system. f

3'5 :f'IReferrin'gf cette? rawingf the ignition device is 'as"'coinpris'iig" a 'housing 2Q whichis adapted to besecuredt to 'theiengine in' an? suitable'l manner. V'In "this housing there' provided fahollow 'sleeve 21 having a- '4'0" shaft 22Ae'irtendingjthere'intofwhichsliaft is included in' the7 driving ''nnetions'between 'tliengine'iand the" hollow "'sle've21. The method lof "journaling :thesleeve 21 in' the distributor andthev method of 'Connecting 45'-af'fshajfr 22'v with fai-@engine --bein'g well lownimthe"artl-noillustration of these structure's'has"beenincluded inthc'drawings. The fend oitlie sleeve-21 isl tapered as at 23 and hasa V:arri2l1ffitting aboutit. f This cam 50 is held inipo'sition on thesleeve 21l by a nut 25'whi'c`h engagesthe'upper threaded end of thesleeve, '.Thecam 24 has a cylindrical extension 26 having a flatsurface'27 which is received by asimilarly shaped recess in a IGNITIONDEVICE."

Application fliedl August 2, 192e -seriai No. 126,413.

rotor block 28. The rotor block 28 carries a conducting strip 29 whichis adapted to rotate in close proximity to the plurality of terminals 30carried b v the distributor head 31 for the purpose of distributingspark impulses to the engine. The distributor head 31 fits on theperipheral edge ot' housing 2O and is held on said housing by clips 32which are hingedly secured to the outer Wall of the housing. v

lWithin the housing there is provided a mounting p late 35,41 detailedplan of which is shownin fFig. -This'- mounting 'plate` has downwardlyturned ears 36`formed'in' spaced relation" on :its periphery, -said earshaving screw-threaded apertures for receivi' ing screws-37 lwhich securethe mounting plate in the housing. 1 These screws also se-4 cure hingebrackets 33 to the housing- 20 which brackets'- hingedly supporttheclips 32. The mounting plate 35 -is provided with elonfratedapertures 38 and 39 oppositely dispose from the central opening 401 insaid plate: A pivot postj41jis carried' on the plate 35 adjacent theaperture 38. Plate 35 supports two members havingl screW driver# slottedheads ft2A andf43 and eccentric stems 42a and 43a'respect'i'velyibywhich .these members are-pivotallyconnected with Athe plate; A'plurality-ofv screw threadedfholes' 44,45, 46' and 67 andrplaim ho'les47'and'48 areprovided in this plate. *E ''.f' f

A"bridgii1g'conductorf 50is secured to the undersidefof plate35-by'1rivets 51. 'A'strip of- =insulation= 521is' interposed' lbetweensaid bridging conductor and the plate35 so that these two elements arenot in electrical connection. 2 The bridging-conductor has angu-l larportionsl53 and 5ft so'constructed and-ar# ranged'tliat 'thei portionV53 will' extend' up throughrthev aperture 39? of plate v35-without-engaging saidv plate While theangular portion 54 extends upthrough the Saperture 38 without engaging. anyl portion of plate 35. Theangular portions'53 and 54 have elongated apertures -53a and` 54a respectively for receiving screws 55 and' 56 respectively which cooperateWithnutsV 55a' and 56a respectively tosecure leaf spring conductors'57and 58 to the angular portions 53 and 54, respectively.` An arm 59 ofthe bridging conductor extends through an aperture 60 formed' in thetimer housing. The arm is insulated from the housing' by two plates 61and 62 secured on opposite sides of the arm 59 adjacent the opening 60in the housing.

An adjustable plate 65 is .pivotally secured to the mounting plate bymeans of a screw 66 which passes through an aperture of plate 65 andscrews into the screw-threaded opening 67 of plate 35. Thus the plate 65is in electrical connection with the mounting plate 35. Plate 65 hasarcuate slots 68 and 69 for receiving screws 70 and 71 respectivelyscrew-threaded into the tapped holes and 46 respectively in the plate35. These screws 70 and 71 when tightened hold the plate 65 in anydesired position on platey 35. Intermediate the screws 70 and 66 theplate 65 is provided with 'an elongated slot 72 into which extends thescrew-driverslot ted head 42 carried? by plate 35. Loosening of screws66, 70 and 71 will permit adjustment-of plate 65 by rotation of the head42 which, as has been 'mentioned before, is rot-atably connectedwith theplate'35 by means of a stem. eccentric to said screwheadf. l

A plurality oi'circuit interrupters are providedinthe housing20,.oneof.said circuit interrupters beingcarried by 'the mountingplate-35 while the othercircuit interrupter is carriedbytheiadjusim'ble` late 65.- The circuit interruptermoun on; plate 35'i'n. cludesz-a'n adjustableb'racket 80- pivo'ted to the post 41.and inelectrical connection therewith. 'lhis :bracket has an. angular portion81 upon .which iscarrieda contact member 82termcdthefstationary-con'tactl- Adjacent-.thisendpf--thefbracket there'-is..pro-

vided an rareuateslot-athrough iwhi'ch' ex- 65.- -A contact bracket 91is pivoted upon this pin 90 and in electrical connection therewithjand,like the other interrupter bracket 80, is provided with an angularportion-93 carrying a stationary contact 94. Adjacent this. contact 94:ythe bracket 9.1 is provided with an arcuate --slot 95 through whichextends the-stem of screw 96. which is screw-threaded into the plate 65.The plate carries an eccentrically mounted screwdriver-slotted head 97which extends into an elongated slot 98 provided in bracket 91. iVhenthe screw is loosened and the head 97 is turned the bracket 91 isrotated relative to its pivot pin 90 carried on the plate 65.

Contact 94 is adapted to be engaged by a contact 99 which is carried atthe free end of a contact arm 100, supportingr a cam follower 105. Likein the other interrupter, contact bracket and contact aim are mountedcoaxially, the arm of the former interrupter being in electricalconnection with the pivot pin and the arm of the latter insulatedtherefrom. In Fig. 4 the Contact arm 100 is shown mounted on theinsulating sleeve 101 which in turn fits over the pivot pin 90 carriedby the adjustable plate 65. The sleeve 101 is held on the pin 90 by alock spring washer 102.

As shown in Fig. 1, the movable contact arm 86 of the interruptercarried. onV the mounting plate 35 is electrically connected with theangular portion 54 of the bridging member 50 by a flat springconductorz-58 while the movable contact arm is electrically connectedwith the other angular portion 53 of the bridging member 50 by the flatspring conductor 57. This spring conductor 57 is' so constructed andarranged as to permit adiustment of. the plate 65 without interferenceby thesprin'g. The spring ressure between contacts 99 and. 94 can eadjusted by loosening the nut 55a which holds screw 55 and moving. thescrew V55 sidewisein the slot 53a in the angularportion 53 in order tomove the stationary 4end of spring 57 relative to thecontact arm 100.The screw 55 and said end of 4spring. 57 .are clamped-in adjustedposition by the -nut:-55. In a similar manner, the fixed end -of .thespring 5 8 can be vadjust ed,-the .screw-56 passing through a slot 54ain. thel angular. portion54. Referring toFig.. 7 it maybeseen that thecontacts of the two interrupters operate inaapredetermined sequence;First the' contacts 82 and 87 will beseparate'd'to provide a sparkingimpulse then the contacts 94 and 99 will be separated tof provideanotherjimF pulse5 these operations' being recurrent. in propersequence. If oneA of thev cam followers should wear more than the other,or if one lobe of thecam wear away faster than another, causing theintervals between sparking impulss to vary, or if for any other reasonthe timing of the sparking impulses be effected, the plate 65 may beloosened and adjusted relative to the plate 35 thereby shifting thepositions of the cam followers relative to the cam and thus vary ing theangular relation between the two cam followers of the two circuitinterrupters relative to the cam for purposes 0f again establishingrproper sequential sparking imzit) pulses. If 'on the other hand theco-operating contacts of either interrupter'do not separate suilicientlyto properly break the circuit, that is, if the movable contact is notmoved a'sufiicient distance from its cooperating stationarycontact bythe operation of the cam, the properstationary contact bracket can beadjusted by'means of its eccentric adjusting screw thereby to adjust the'gap' between the said cooperating contacts.` To make such anadjustment, for instance, between contacts-94-'and 99, the operatorfirst unscrews the screw 96 t0 release the contact bracket 91 from theplate 65,V then the screW-driver-slotted head 97 is rotated to move thecontact bracket 91 about its pivoted pin 90 toward the cam 24. The camis then rotated so that the cam follower 105 of the contact Carrying arm100 rides upon one of the cam lobes. Following this, a shim of properthickness is placed between the contacts 94 and 99 and then thescrewdriver-slotted head 97 is rotated to move the contact carryingbracket 91 so that the shim may easily be withdrawn from between thecontacts. After this screw 96 is again tightened to clamp the contactcarrying bracket 91 upon the plate 65. The interrupter including bracket8O and arm 86 may be adjusted in a similar manner. From Athis it will benoted that all of these adjustments may be made with a. single screwdriver. No special tools are necessary and neither need be held inadjusted position While it is being secured in the adjusted position.Thus the present device provides an ignition timer of simplev structureand design which may be easily adjusted.

While the form of embodiment of the present invention as hereindisclosed, constitutes a preferred form, it is to be understood thatother forms might be adopted, all coming within the scope of the claimswhich follow.

What is claimed is as follows:

1. An iginition device comprising in combination, a housing; a cam inthe housing; pivot pins in said housing; an adjustable, stationarycontact bracket pivoted on each of said pivotpins and in electricalconnection therewith; and a cam operated, contact carrying arm pivotedon each of said pivot pins so that the contact of each arm is adapted toengage the contact of its respective stationary contact bracket.

2. An ignition device comprising in combination, a housing; a cam insaid housing; a pivot pin in the housing; a contact carrying bracketpivoted to said pin and in electrical connection therewith; a. camoperated contact carrying arm also pivoted on said pin, but insulatedfrom the bracket and pin; a flat spring conductor anchored to said arm,and adapted to hold the contact of the arm in engagement with thecontact of the bracket; and means for moving the bracket on the pivotpin to adjust said bracket relative to the contact arm.

3. An ignition device comprising in combination a housing; a cam in saidhousing; an apertured mounting plate secured in the housing; aconducting bridging member insulatingly secured to the one side of thesaid mounting plate, said member having angular portions extendingthrough the apertures in said plate; circuit interrupters in saidhousing on the side of the mounting plate opposite the bridging member,said interrupters each including a stationary contact bracket andamovable arm carrying a contact adapted to engage with the contact of thestationary bracket; and a leaf spring conductor interposed between eachcontact arm and an angular portion of the bridging member extendingthrough thev mounting plate, and being in eieetrical connection withboth.

4. An ignition device comprising in combination, a housing; a cam insaid housing; an apertured mounting plate secured in said housing; aplurality of circuit interrupters in said housing, on one side of themounting plate; a conducting bridging member insulatingly secured to theother side of the mounting plate, the said member having angularportions extending through the apertures of the mounting plate; aterminal arm extending from the bridging member through the housing butinsulated therefrom; and leaf spring conductors interposed between theinterrupters and the several angular portions of the said member.

5. An ignition device comprising in combination, a housing; a cam insaid housing; a mounting plate secured in the housing; an adjustableplate pivotally carried by mounting plate and in electrical connectiontherewith; circuit interrupters supported on each of said plates, saidinterrupters each including an adjustable bracket carrying a contact anda co-operating contact carrying arm coaxially pivoted on the respectiveplates; and conducting means normally holding the movable contact on thearm in engagement wit-h the contact on the bracket.

6. An ignition device comprising in combinat-ion, a housing; a cam insaid housing; a mounting plate secured in the housing; a pivot pin onsaid plate; an adjustable plate pivotally carried by the mounting plateand in electrical connection therewith, said adjustable plate alsohaving a pivot pin; circuit interrupters in said housing, one of whichis carried by the mounting plate, the other by the adjustable plate eachinterrupter including a contact carrying adjustable bracket pivoted onand elect-ricallj. connected with the pivot pin of its respective plate,and also including a cam controlled, contact carrying arm also pivotedon but insulated from the pivot pin of its respective contact bracket;and spring conductors connected to each contact carrying arm and adaptednormally to hold the Contact of the arm in engagement with therespective bracket Contact and to conduct electric current to each ofsaid arms.

7 An ignition device comprising in cornbination, a housing; a cam insaid housing; an apertured mounting plate secured in the housing; apivot pin on' said plate; an adjustable plate pivotally carried by themounting plate and in electrical connection therewith, said adjustableplate also having a pivot pin; circuit interrupters in said housing, oneof which is carried by the mount-ingplate, the other by the adjustableplate, each interrupter including a contact carrying adjustable bracketpivoted on and electrically connected with the pivot pin of itsrespective plate, and also including a cam controlled, contact carryingarm also pivoted on but insulated from the pivot piu of its respectiveContact bracket; a bridging, conducting member insulatingly secured tothe side of the mounting plate opposite the adjustable plate, saidmember including angular portions extending through the apertures in themounting plate; and spring conductors interposed between said angularportions and the several cam controlled contact arms.

In testimony whereof I hereto affix my signature.

WM. D. scHRoPE.

